Parents at a Colorado school are outraged their kids were encouraged to visit the local Coors brewery to earn extra credit in science class.

The teacher wanted students to learn about the brewing process as part of a lesson on fermentation. But Adrienne Moerz, the mother of a 15-year-old student at Ralston Valley High School in Arvada, Colo., said having kids visit the brewery encourages underage drinking, KDVR reports. Moerz said the assignment is essentially a “how-to” guide for students to brew their own beer, and that since her family has a history of alcoholism, she doesn’t want her daughter exposed to alcohol at such an age.

“I don’t see any reason to teach a 15 year old the steps in brewing alcohol,” she said.

The Jefferson County school board said the curriculum is standard, but that they would review the assignment.

“While we value the efforts our teachers make to inspire learning in our students, we will be reviewing the assignment in question,” the school district said late Monday.